Electric accumulator.



Patent'ad Feb. 4,- I902. C. P. ELIESON 8:. V. BE BDBINSKY.

ELECTRIC AGCUMULATOR.

(Application filed May 15, 1901.)

(No Model.)

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Nrrnn STATES PATENT OFFICE.

CHAIMSONOVITZ PROSPER ELIESON AND VLADIMIR DE BOBINSKY, OF

PARIS, FRANCE.

ELECTRIC ACCUM ULATOR.

SPECIFICATION forming part of Letters Patent No. 692,433, dated February4, 1902 Application filed May 15,1901. Serial No. 60,315. (No model- Toall whom it may concern:

Be it known that we, CHAIMSONOVITZ Pnos- PER ELIESON and VLADIMIR DEBoBINsKY, subjects of the King of Great Britain, and residents of Paris,France, have invented certain new and useful Improvements in ElectricalAccumulators, of which the following is a specification.

Our invention relates to electrical accumulators comprising very thinbands or strips of lead, which are alternately corrugated and straightand form very clear and regular spaces. The mounting of the accumulatorallows the said strips to expand in a transverse direction laterally,because on the edges there is no mounting uniting the said strips oflead together. These strips, which constitute the active surface of theaccumulator, are united together by a central core of lead, whichconstitutes a kind of backbone, from each side of which extend the thinstrips of lead, or, again, this accumulator may be said to be similarinappearance to a birds feather, the shaft of which constitutes thecentral con ductor and the lead strips resembling the vanes of thefeather. A plate of our accumulator is reduced to what We have justexplained; but in order that it may not get out of shape and that itshall possess suflicient strength when handled we strengthen it with aframe, which is, however, completely insulated and which in nowayinvolves the employment of metal. At the top and bottom we arrangecross-pieces of wood, ebonite, or other insulating material, and on thesides we arrange small strips of wood, ebonite, or other like material.Pieces of india-rubber placed on the said bands and embracing the upperand lower cross-pieces give sufficient strength to the whole and serveat the same time to separate the plates. In this manner with a verylittle weight we construct an accumulator of great electrical capacity,which will not get out of shape, because the small strips of lead, whichconstitute the active elements, extend from a central conductor and canfreely expand. Moreover, our accumulator-plate is clearly distinguishedfrom plates of known construction by the absence of all metalliccovering-frames.

Having thus explained the principle of our accumulator, we will describeby way of example a practical way of carrying out our invention withreference to the accompanying drawings.

Figure 1 represents a plain strip at. Two or preferably three of themare generally placed upon one another, as shown in Fig.2. Fig. 3represents a corrugated strip .2; and Fig. 4 shows, on a smaller scale,a band formed of several corrugated strips. Fig. 5 is a front elevationof an fiOClllIllllfill0P-Plitt6 formed with superposed strips. In thisfigure a part is broken away in order to show the strips on the side.Fig. 6 is a side elevation. Fig. 7 is a horizontal section. Fig. Sis asection on the line M N, Fig. 5; and Fig. 9 is a section on the line PQ. Fig. 10 is a horizontal section showing several juxtaposed plates,the accumulator. comprising two positive plates interposed between threenegative plates.

Each accumulator-plate is constructed of two columns composed of acertain number of lead strips or and b and which are alternatelycorrugated and flat. These lead strips a Z; are free at their outersides; but at approximately the middle of the plate they are unitedtogether by lead strips 0, connected by solder with the ends of thestrips a and b. The two columns are placed almost side by side, the twosupports 0 0 receiving between them a strip of lead d. With grains ofsolder e the said lead strip cl is united to ribs 0 c of the twocolumns. As shown, the accumulator plate is provided at the middle inthe direction of its length with a compound strengthening-rib comprisingthe united strips 0 and d, on each side of which extend small leadstrips a and I), designed to constitute the active surfaces of theaccumulator. The middle rib thus formed extends upward in the form of alead stem f, whereby the plate can be handled. The latter has connectedto one side of its upper part a lead rod g, as indicated in Fig. 5,which serves to establish the connectionsforcommunicatingcurrent. Theaccumulator-plate is completed bya number of upper and lowercross-pieces '53, of Wood, ebonite,or other insulating material. Woodenstrips 70 7.: are applied to the sides, and pieces :00

of india-rubber placed over the strips of wood 7c and over thecross-pieces ij bind the whole of the plate together and also serve toseparate the adjacent plates. The plate thus formed is a positive plate.A negative plate is constructed in the same manner, with the differencethat there are no wood strips 70 k. The connecting-rods of the positiveplates are always on the same side. Those of the negative plates are allon the opposite side. In Fig. 10 the middle plate is a negative plate,and on each side are two positive plates, the two end plates being alsonegative plates.

We would observe that, contrary to the arrangements usually adopted,this accumulator-plate has no metallic frame.

70 claim- 1. An electric accumulator-plate comprising a centralconducting-core, and strips of thin lead alternately flat andcorrugated, at-

tached at one end to each side of the core and free at their other end.

2. The combination with an accumulatorplate having a centralconducting-core, and

strips of thin lead alternately flat and corru- 2 5 gated, attached atone end to each side of the core and free at their other end, and astrengthenin g frame comprising upper and lower cross-pieces ofinsulating material and indiarubber ligatures binding the whole together30

